I recall one motorcycle magazine tested the Enertia Classic at 16s 0-60. The motor plummets at a certain RPM, which on the EC is about 55 mph - acceleration before then is better than a 16s 0-60 would lead you to believe.
I tested my 2012 Zero S at 10s 0-60. It doesn't feel slow in practice over 20 mph, but that's slower than I would have expected.
Brammo may have regeared the E+ to raise the speed at which power plummets. This will increase the effective top speed, but it has the side effect of decreasing acceleration until the point of power drop-off.
The Enertia Classic has 4.9:1 gearing and produces 40Nm at the motor, so 197 Nm / 145 ft-lb at the rear wheel. It's in no danger of pulling a wheelie : P
Wheelbase 56", if CoG is in the center then you'd need about (320lbs bike + 200 lbs rider) * 28" = 1200 ft-lbs to wheelie. Maybe less with some creative positioning..
I bet the Empulse can loft the front wheel though..